Slider with company logo on?

Hi all,

i want to create a slider with an image which is made darker and a company logo above the caption. I take it the slider on Blocs is pretty restricted/basic to an image and a caption, or is there a way to do this as a div and not go into a div?

I would like have some images of jobs/events in the background and darken (yes I can do this before bringing it in, but hoping to be able to use the tools in Blocs) and want to add a header and my clients logo in the middle.

Thanks all !